The NSA devices must be fine tuned to Double SHA256 calculations to have even remote chance doing 51% attack on Bitcoin. And this will be one-shot wonder weapon.
I really hope Im wrong and Im sure Im not the first person to consider this. Also, a 1 billion dollar market cap currency isnt a threat to the dollar.
But what about 10 billion? 100billion? 1 trillion? 10 trillion? When do they decide to pull the trigger, if they could?
Why cant they just write Bitcoin hashing code for their existing code breaking machines, fork the chain, invalidate all our coins, and then go back to hacking your Facebook to learn grandma's secret pie crust recipe?
